Lots of monomers such as ethene join together to make a long chain molecule called a polymer.

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What is the function of a catalyst?

A catalyst speeds up the reaction without being used up in the reaction.

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Which family of hydrocarbons has only single bonds between carbon atoms?

The alkanes.

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What is a monomer?

a small molecule that can be joined into long molecules.

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What is an everyday word for polymer?

Plastic.

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What do you call the method used to separate mixtures of liquids like crude oil?

Fractional distillation.

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What chemical is used to test for a double bond? What colour change do you observe?

Bromine water. Which is an orange liquid that goes colourless when it reacts with double bonds

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Give a disadvantage of recycling plastics?

Need to separate the plastics before they can be reused. Need to organise for the unwanted plastics to be collected

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In the cracking process long chain hydrocarbons are broken down into short chain hydrocarbons. Why do we need to do this?

The short chain hydrocarbons are in demand as petrol and we have too many of the long chain hydrocarbons.

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List the advantages of making ethanol by fermentation rather than from ethane.

Fermentation uses sugar which is a renewable resource. Do not have to use up crude oil reserves if we use fermentation.

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List 2 advantages of using ethene to make ethanol rather than fermentation.

Alcohol produced from ethene is 100% and does not need to be distilled The ethene process is a continuous process and is only stopped if something goes wrong. It does not rely on living things like fermentation which relies on yeast.

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What 4 things could happen to an unwanted washing up liquid bottle?

It could go to landfill. It could be reused. It could be burnt to give off heat. It could be melted down and made into new items.